This is the 193rd most frequent Finnish word.
takaisin
"Takaisin" means "back" or "return" in English.
In this sentence, 'takaisin' means 'back' and is used to indicate returning to a previous place, in this case, 'home'.
Haluan mennä takaisin kotiin.
I want to go back home.
Here, 'takaisin' means 'back' as in returning an item, specifically the book, to its previous owner or place.
Annatko kirjan takaisin?
Will you give the book back?
In this case, 'takaisin' is used to indicate the location where something was re-found or revisited, implying a return to a known situation or circumstance.